在X3中，默认的Oracle9i角色数为30，当导入的folder数超过5个时将出现角色超过默认限制导致无法导入新folder的错误。

修改方法如下：

1. open a windows command session: cmd

2. login into Oracle sqlplus : sqlplus /nolog

3. connect to the instance you want to modify using sys as sysdba role:
   conn sys/change_on_install@adx_v5 as sysdba;

4. alter oracle max_enabled_roles:
   alter system set max_enabled_roles=148 scope=spfile;

5. shutdown Oracle database:shutdown immediate

6. start oracle db:startup